| 摘要 |
In order that a tray in a disk exchanging position may not be brought out or damaged even when it is pulled, a disk recording/reproducing device includes a rack loader made slidable perpendicularly to the carrying direction of the tray, and a switch for turning ON/OFF in response to sliding action of the rack loader. The rack loader has a cam rod boss rising therefrom, and the tray is provided on its bottom face with a rack extending in its carrying direction and meshing with a pinion, and a generally L-shaped cam groove for fitting the cam rod boss loosely therein. The cam groove has a longitudinal cam groove extending in parallel with the rack, a transverse cam groove perpendicular to the rack, a corner cam groove formed obliquely between the longitudinal cam groove and the transverse cam groove, a trapezoidal curve portion formed near the back end of the longitudinal cam groove and curved generally in a trapezoidal shape, and a straight portion formed behind the trapezoidal curve portion and lying on an extension line of the longitudinal cam groove. A central portion of the trapezoidal curve portion and the corner cam groove portion at passing time of the cam rod boss provide OFF area of the switch, and the longitudinal cam groove and the straight portion provide ON area of the switch.
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